Discharging device
A discharging device for discharging liquids includes an outer housing encompassing an inner chamber, a liquid storage receptacle, a discharge orifice, a delivery device for delivering liquid from the storage receptacle to the discharge orifice, a cap that covers the discharge port orifice when present on the outer housing in a safety position, and a manual actuator adapted to actuate the delivery device and which is movable relative to the outer housing between a neutral relative position and an actuated relative position. The cap and the manual actuator cooperate so that displacement of the manual actuator is mechanically blocked when the cap is in its safety position. A locking element that is movable in relation to the outer housing is constrainedly coupled with the movement of the manual actuator and extends in the actuated position through a hole in the outer housing to a region that the cap blocks when mounted in its safety position.
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The invention relates to a discharging device for the discharge of liquids, more particularly pharmaceutical liquids, which discharging device comprises an outer housing encompassing an inner chamber, a liquid storage receptical, a discharge orifice, a delivery device for the delivery of liquid from the liquid storage receptical to the discharge orifice, a cap that covers the discharge orifice when placed on the outer housing in a safety position, and a manual actuator that is adapted to actuate the delivery device and can be moved from a neutral position to an actuated position and vice versa relatively to the outer housing. The cap and the manual actuator cooperate in such a way that displacement of the manual actuator is blocked mechanically as long as the cap is in its safety position.
This application claims the priority of the German patent application No. 102009049903.2. The whole disclosure of this prior application is herewith incorporated by reference into this application.
BACKGROUND OF THE INVENTIONGeneric discharging devices are known in the prior art. Their distinctive feature consists in that actuation is not possible when the cap is in place on the discharging device. Accidental actuation of the discharging device is thus effectively prevented.
An example of a generic discharging device is disclosed in EP 1 051 262 B1. The discharging device shown and described in this reference comprises two extensions on a cap that extend into the discharging device through holes provided on an outer housing of the discharging device and that block displacement of the manual actuator when the cap is placed on the discharging device at least to the extent that a full discharging operation is not possible.
Despite the actuation-proof action of the cap, the discharging device disclosed in EP 1 051 262 B1 is not suitable as an effective protection against improper actuation of the discharging device by children, since the extensions provided on the cap prevent the use of a more complex type of cap such as a child-proof screw cap. There is therefore a high risk of children successfully removing the cap from the outer housing or lifting the cap from its safety position by applying great force to the manual actuator and thus being able to gain access to the pharmaceutical liquid that will then be dischargeable.
SUMMARY OF THE INVENTIONIt is an object of the invention to develop a generic discharging device to the effect that it allows more secure protection against improper use by children and/or allows more flexibility in the use of different types of caps.
This object is achieved, according to the invention, in that at least one locking element is provided that is displaceable relatively to the outer housing and the movement of which in relation to the outer housing is constrainedly coupled to the movement of the manual actuator, this locking element extending, at least in the actuated position of the manual actuator, through a hole in the outer housing into a cap region, in which the cap is disposed in its safety position.
Thus in one design of the invention, the locking element that serves to create the constrained coupling between the cap and the manual actuator is not provided on the cap, but instead is attached to the manual actuator or is at least constrainedly coupled to the same. Thus, following the removal of the cap, the locking element remains on the discharging device, which is then ready for use, and is protected from damage at least partially by the outer housing of the discharging device.
The locking element and the hole in the outer housing, through which the locking element protrudes into the cap region when the manual actuator is actuated, are adapted to suit the cap in such a way that when the cap is disposed in its safety position the locking element collides with the cap when the manual actuator is actuated but before a full discharging operation can be effected. For the purposes of the present invention, the term “safety position” is regarded as being the end position of the cap when placed on the outer housing. The hole preferably has a size that is only slightly larger than the cross-section of the locking element, since the locking element is preferably only moved through the hole without having to be moved transversely to the direction of extension within the hole.
Due to the fact that the locking element is not provided on the cap, no special demands are made on the cap. The cap can thus assume all conventional forms known in the prior art and can also be adapted to be fitted on the outer housing and removed from the same by means of a movement other than a linear movement. The cap can thus be in the form of a screw-threaded cap, for example, comprising a male thread by means of which the cap can be screwed into a female thread provided on the outer housing of the discharging device. A screw-threaded cap of such type poses a considerable hurdle for small children and it also cannot be overridden by applying considerable force to the manual actuator particularly due to the self-locking action of the screw threads.
The delivery device of a discharging device of the invention is preferably in the form of a pump that comprises a pump chamber, the contents of which can be pressurized by applying force to the manual actuator. The displacement of the manual actuator as a result of the manual application of force preferably takes place against the force of a return spring. The delivery device and the return spring can be part of a pump-type disperser included in the discharging device.
It is particularly advantageous when the screw-threaded cap is in the form of a screw-threaded safety cap and, as such, comprises an internal portion comprising the screw thread and an external portion that is accessible from the exterior and that can be displaced axially relatively to the internal portion for being coupled to the internal portion for rotation therewith. As a result, a higher degree of safety is achieved which makes it difficult for children, and more particularly small children, to discharge the medium from the discharging device.
Furthermore, it is of particular advantage that the locking element is formed such that it is disposed, at least partly, in the hole in the outer housing both in the actuated position and in the neutral position of the manual actuator in relation to the outer housing. As a result, the hole is always closed so that dirt is prevented from entering the same. In particular, such an arrangement of the locking element being permanently in the hole makes it unnecessary to carry out additional operations for the purpose of inserting the locking element into the hole during operation of the discharging device once the locking element has been into the hole during the assembly operation and there is thus no fear of the locking element becoming wedged in the hole.
The locking element can be moved indirectly by the manual actuator, for example, in order to have a speed or direction of movement that differs from that of the manual actuator. However, it is regarded as being particularly advantageous when the locking element is attached to the manual actuator so as to be immovable relatively thereto or when the locking element is integrally molded on a main portion of the manual actuator, since this enables the cap in its safety position to have a particularly direct effect on the mobility of the manual actuator. In such designs, the locking element always directly follows the movement of the manual actuator. When the locking element cannot be moved any further due to the cap being in position on the discharging device, it is also not possible to move the manual actuator any further so that a discharging operation cannot take place.
Furthermore, it is of particular advantage when two locking elements are provided such that each extends through opposite holes in the outer housing one on each side of the discharge orifice at least in the actuated position of the manual actuator. A higher degree of safety is achieved as a result of this design comprising two locking elements. Of particular advantage is a design, in which two finger rests are provided on the outer housing at positions opposite to each other one on each side of the discharge orifice and that are disposed such that they are offset, preferably by 90°, in the circumferential direction in relation to the holes.
Furthermore, the invention relates to a generic discharging device in which at least one locking extension extending in a pull-off direction of the cap is provided on the cap, which locking extension extends through a hole in the outer housing in the safety position of the cap for the purpose of causing the mechanical actuator to be blocked in the inner chamber. The locking extension is adapted to match the hole such that total separation of the cap from the outer housing in the pull-off direction starting from the safety position is possible only when the cap has been displaced beforehand relatively to the outer housing in an orthogonal plane oriented orthogonally to the pull-off direction so as to move from a locked state, corresponding to the safety position, to the released state.
This design of the invention can thus resemble the design disclosed in the aforementioned EP 1 051 262 B1. Particularly, in order to make it difficult for children to remove the cap and thus actuate the manual actuator, the cap cannot be removed by pulling it off in the pull-off direction preferably corresponding to the main direction of extension of the discharging device without also displacing the cap transversely to the pull-off direction as it is being removed. For example, provision can be made for having to initially displace the cap and, with it, the locking extension translatively in a direction parallel to the orthogonal plane in order only then to allow the removal of the cap in the pull-off direction. The term “displacement of the cap parallel to the orthogonal plane” is understood to mean a displacement, in which at least all components of the cap that are accessible from the exterior when the cap is in position on the discharging device are jointly non-destructively displaced to the same extent and as a whole. However, provision can also be made for those parts of the cap that extend into the outer housing of the discharging device to be displaced to a lesser degree by deflection. This is explained below in greater detail.
The locking extension formed in accordance with this design performs a dual function as proposed by the invention. Firstly, it serves to block the manual actuator as disclosed in EP 1 151 262 B1. Secondly, it is adapted to match the hole such that the removal of the cap from the outer housing requires a complex sequence of movements that are for children difficult to comprehend.
A design, in which the locking extension comprises a main portion which, in the locked position of the cap, is aligned with the hole in the pull-off direction, and an undercut portion that is attached to, preferably molded on, the locking extension and that is not aligned with the hole in the pull-off direction in the locked position of the cap, is particularly advantageous. Thus an undercut portion is provided on the locking extension, which undercut portion together with the outer housing or portions of the outer housing that are immovable relatively thereto forms an undercut that impedes the cap from being merely pulled off in the pull-off direction without a movement of the cap in the orthogonal plane. Only when the undercut shoulder is aligned with the hole is it possible to remove the cap.
Of particular advantage is a design, in which a force-applying member, particularly a resilient force-applying member, is provided that applies a counteracting force to the cap, which force counteracts the displacement of the cap from the locked state to the released state. This particularly prevents the cap from being automatically moved to its released state, for example, by means of forces acting on the entire discharging device during movement thereof, in which case it could easily be opened even by a child. Such a counteracting force poses a serious obstacle to a small child attempting to remove the cap from the outer housing.
Particular preference is given to a force-applying member that is provided in the form of a resiliently deflectable fin that is attached either to the outer housing or is immovable relatively thereto or is attached to the cap. It is particularly advantageous when the force-applying member is provided in the form of a resiliently deflectable fin on the locking extension of the cap. This deflectable fin is resiliently deflected, particularly by means of a counterpart that is immovable relatively to the outer housing during a displacement of the cap from the locked state to the released state. It is likewise feasible for the counterpart that is immovable relatively to the outer housing also to be resiliently deflectable. Such a design comprising a resiliently deflectable fin is very easy to produce, since no separate components are required for this purpose.
Of particular advantage is a design in which the cap and the outer housing are mutually configured such that the displacement of the cap from its locked state to its released state is possible only when the cap has first been displaced in the pull-off direction starting from the safety position. This can be achieved, for example, by means of the shape of the locking extension or alternatively by any other elements provided on the cap, or on the outer housing, for positively counteracting such a displacement. The advantage of this design is that it is very difficult for a child, more particularly for a small child, to comprehend that the cap has to be moved in three different phases beginning with a movement in the pull-off direction while retaining its locked state and continuing with a movement in the orthogonal plane until the released state is achieved before it is possible to continue displacement of the cap in the pull-off direction. Preferably, the cap must be moved by at least 2 mm, more preferably by at least 4 mm, relatively to the outer housing while retaining the locked state before it can be moved in the orthogonal plane to achieve the released state. Since lifting the cap through the aforementioned 2 mm or 4 mm restricts the mobility of the manual actuator in relation to the outer housing, it is regarded as being preferable to limit this displacement distance to such effect that the displacement of the manual actuator from its neutral state through this distance does not cause any discharging operation to take place.
In a particularly preferred design of the invention, a plurality of locking extensions is provided on the cap, to each of which a hole in the outer housing is assigned. In this case it is preferred that each of the locking extensions and the assigned holes be mutually configured such that all of the locking extensions can be displaced relatively to the respective holes from the locked state to the released state by rotating the cap about a rotation axis extending parallel to the pull-off direction. Such a design can be achieved, for example, in that undercut portions provided on two opposing locking extensions disposed on the cap one on each side of the discharge orifice, extend in opposite directions. Thus a rotational movement for transferring the cap from its locked position to its released state causes all the undercut portions to be simultaneously aligned with the respective holes so that it is then possible to remove the cap. A rotational movement is primarily advantageous since it can take place in the same direction, preferably in the clockwise direction as viewed from above the cap, irrespective of the manner in which the discharging device is being held by the patient.
Additional aspects and advantages of the invention are revealed by the claims and the following description of exemplary embodiments of the invention in conjunction with the drawings. Individual features of different described embodiments can be combined with each other in any manner without surpassing the frame and scope of the invention.
The subcomponents of this first embodiment are explained below with reference to
The discharging device is adapted to bring about a discharging operation by means of a manually forced displacement of the manual actuator 30 and thus of the liquid storage receptacle 52 of the pump-type dispenser 50 relatively to the housing 10 and thus relatively to the outlet connector 56 permanently fixed in the housing 10. As a result of the progressive displacement of the manual actuator, a pump chamber in the pump-type dispenser 50 is continuously compressed so that liquid is pressed out of the pump chamber in the direction of the outlet connector 56. The liquid discharged by the outlet connector 56 flows into the passageway 18 and is thus caused to pass to the discharge orifice 20.
As particularly shown in the illustration in
A safety cap 70 is provided for locking the discharging device shown in
The female thread 72 is provided on an internal component 74 of the cap 70. The internal component 74 is not directly accessible from the exterior but is instead shielded by an external component 76. This external component 76 is displaceable relatively to the internal component 74 in the direction of the arrow 4. Lugs and holes that cooperate positively are provided on the end surface 75 of the internal component 74 and on the complementary internal surface 78 of the external component 76, which lugs and holes create a positive fit between the external and internal components when force is applied to the external component 76 in the direction of the internal component 74. As a result of this positive fit, the two components 74, 76 are interconnected for co-rotation so that rotation of the external component 76 about the axis defined by the arrow 4 causes the internal component to be rotated and thus the cap 70 to be totally unscrewed from the male thread 24 of the housing 10.
The surface of the internal component 74 that is oriented toward the housing 10 comprises a circumferential safety flange 77. In the locked state shown in
This arrangement blocks any movement of the manual actuator 30 in relation to the housing 10 in the direction of the arrow 2a when the cap 70 is in the locked position as shown in
Only when the cap 70 has been unscrewed, and thus the state shown in
In this regard, the basic construction of the second embodiment of the discharging device will first be explained with reference to the illustrations in
As in the first embodiment described above, this second embodiment of the discharging device likewise comprises a housing 110, in which a manual actuator 130 is mounted so as to be displaceable in the direction of the arrow 102a. Furthermore, the housing 110 likewise comprises a discharge orifice 120 that can communicate with a fluid storage receptacle 152 by way of a connecting passageway 118. However, unlike the design shown in
As is also the case in the embodiment shown in
As is evident particularly from
As is evident from
An additional safeguard against the removal of the cap 170 is provided by lateral depressions 124 provided in a mirror-inverted manner on the housing 110, into which depressions inwardly oriented catches 178 that are attached to the cap 170 extend when the cap 170 is placed on the discharging device. The catches 178 can be removed from the depressions 124 in that the short sides 170a of the cap 170 are pressed toward each other so that the long sides 170b bulge out, and thus the catches 178 move outwardly.
A removal of the cap 170 is possible only when the undercut portions 176 have been displaced in the direction of the arrow 106a extending transversely to the pull-off direction 102a relatively to the portion 122a fixed to the housing. For this purpose, the cap 170 is substantially rotated as a whole unit about the main axis 101 in the clockwise direction. During rotation of the cap, the catches 178 on the cap 170 move within the recesses 124 of the housing, but do not leave the recesses 124.
As seen in
When this rotated state of the cap shown in
Claims
1. A discharging device for discharging liquids comprising:
- an outer housing encompassing an inner chamber;
- a liquid storage receptacle;
- a discharge orifice;
- a delivery device for delivering liquid from the liquid storage receptacle to the discharge orifice;
- a cap covering the discharge orifice when secured to the outer housing in a safety position;
- a manual actuator configured to actuate the delivery device and for moving relative to the outer housing in an axial direction between a neutral relative position and an actuated relative position; and
- at least one extension that extends in the axial direction, the at least one extension being movable in relation to the outer housing, with movement of the at least one extension being constrainedly coupled with movement of the manual actuator;
- the outer housing having a hole therethrough in a region of the cap when the cap is secured to the outer housing in the safety position;
- the at least one extension moving through the hole in the outer housing when the manual actuator is moved to the actuated position such that the at least one extension extends further through the hole when the manual actuator is in the actuated position than when the manual actuator is in the neutral relative position;
- the cap, the at least one extension and the manual actuator cooperating in such a manner that displacement of the manual actuator is mechanically blocked by the cap when the cap is in the safety position;
- wherein the at least one extension moves through the hole in the axial direction.
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- Machine Translation of FR 2682305 by EPO.
Type: Grant
Filed: Oct 12, 2010
Date of Patent: Oct 14, 2014
Patent Publication Number: 20110088692
Assignee: Aptar Radolfzell GmbH (Radolfzell)
Inventors: Judith Auerbach (Radolfzell), Thomas Eberhard (Radolfzell), Wilfried Graf (Radolfzell)
Primary Examiner: Paul R Durand
Assistant Examiner: Jeremy W Carroll
Application Number: 12/925,045
International Classification: B27D 1/00 (20060101); B05B 11/00 (20060101);
